{"product_id":"allen-bradley-1756-oh8i-isolated-output-module-controllogix-plc","title":"Allen-Bradley 1756-OH8I Isolated Output Module – ControlLogix PLC","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1756-OH8I is a high-performance ControlLogix isolated output module engineered for demanding industrial automation environments. As part of the ControlLogix series, this module provides 8-point individually isolated 120V DC sinking\/sourcing outputs, delivering precise and reliable control for your discrete output applications. Whether you are managing solenoids, contactors, or indicator lamps, the 1756-OH8I ensures clean switching and robust performance.\u003c\/p\u003e\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8 individually isolated outputs\u003c\/strong\u003e – each point is isolated to prevent cross-talk and enhance system reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e120V DC sink-source capability\u003c\/strong\u003e – flexible wiring accommodates both sinking and sourcing configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide operating voltage range\u003c\/strong\u003e – 90-146V DC ensures stable operation even with fluctuating supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh current handling\u003c\/strong\u003e – 2A per point and 8A per module at 60°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable terminal blocks\u003c\/strong\u003e – supports 1756-TBCH and 1756-TBS6H for easy wiring and maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust environmental tolerance\u003c\/strong\u003e – operates from 0 to 60°C with 5-95% relative humidity.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eBelow are the key technical specifications of the Allen-Bradley 1756-OH8I, sourced directly from the manufacturer's data:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number \/ Catalog No.\u003c\/td\u003e\n\u003ctd\u003e1756-OH8I\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eControlLogix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eIsolated Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003e8-Point Individually Isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120 Volts DC Sink-Source\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e90-146 Volts DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Output Current Rating - Point\u003c\/td\u003e\n\u003ctd\u003e2 Amps at 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Output Current Rating - Module\u003c\/td\u003e\n\u003ctd\u003e8 Amps at 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation (Max)\u003c\/td\u003e\n\u003ctd\u003e3.3 Watts at 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current at 5 Volts\u003c\/td\u003e\n\u003ctd\u003e210 milliamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemoveable Terminal Block(s)\u003c\/td\u003e\n\u003ctd\u003e1756-TBCH, 1756-TBS6H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e50 Volts Continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eNone (Open Style)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e10612598171443\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eApplications \u0026amp; Use Cases\u003c\/h2\u003e\u003cp\u003eThe 1756-OH8I is ideal for a wide range of industrial control applications where reliable discrete output switching is critical. Typical use cases include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial handling systems\u003c\/strong\u003e – controlling conveyor motor starters and diverters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess control\u003c\/strong\u003e – actuating valves and solenoids in chemical or food processing lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachine tools\u003c\/strong\u003e – switching coolant pumps, spindle drives, and auxiliary equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThanks to its 120V DC output capability and high per-point current, the module handles demanding loads with ease, reducing the need for interposing relays.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eInstalling the 1756-OH8I is straightforward. Mount the module into any ControlLogix chassis slot, then connect the removable terminal block (1756-TBCH or 1756-TBS6H). Ensure that the power supply voltage stays within the 90-146V DC range. For sinking outputs, connect the load between the output point and the positive supply; for sourcing, connect between the output and the negative supply. Always follow the wiring diagram provided in the user manual to avoid misconnection.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eTo ensure long-term reliability, periodically inspect the terminal block connections for tightness and signs of corrosion. The module's open-style enclosure allows for good airflow, but keep the surrounding environment free of excessive dust and moisture. The 1756-OH8I is designed to withstand operational vibration of 2G at 10-500Hz and shock up to 20G, making it suitable for harsh industrial settings. With proper care, this module delivers dependable service for years, minimizing downtime and maintenance costs.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eWhen selecting the 1756-OH8I, verify that your ControlLogix chassis has an available slot and that the backplane current draw (210mA at 5V) is within your system's capacity. Consider the removable terminal block options (1756-TBCH or 1756-TBS6H) based on your wiring preferences. For genuine, quality-tested automation spares, PLC Source PRO offers the Allen-Bradley 1756-OH8I with reliable availability and competitive pricing.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44436057817187,"sku":"1756-OH8I","price":285.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1756-2WS_acf599df-421c-434c-af42-30c850a67388.jpg?v=1785791002","url":"https:\/\/www.plcsourcepro.com\/ar\/products\/allen-bradley-1756-oh8i-isolated-output-module-controllogix-plc","provider":"PLC Source PRO","version":"1.0","type":"link"}